33623440121 has 4 divisors (see below), whose sum is σ = 34338832512. Its totient is φ = 32908047732.

The previous prime is 33623440099. The next prime is 33623440127. The reversal of 33623440121 is 12104432633.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12104432633 = 17 ⋅712025449.

It is a cyclic number.

It is not a de Polignac number, because 33623440121 - 2²⁶ = 33556331257 is a prime.

It is a super-2 number, since 2×33623440121² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33623440127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 357696125 + ... + 357696218.

It is an arithmetic number, because the mean of its divisors is an integer number (8584708128).

Almost surely, 2^33623440121 is an apocalyptic number.

It is an amenable number.

33623440121 is a deficient number, since it is larger than the sum of its proper divisors (715392391).

33623440121 is an equidigital number, since it uses as much as digits as its factorization.

33623440121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 715392390.

The product of its (nonzero) digits is 10368, while the sum is 29.

Adding to 33623440121 its reverse (12104432633), we get a palindrome (45727872754).

The spelling of 33623440121 in words is "thirty-three billion, six hundred twenty-three million, four hundred forty thousand, one hundred twenty-one".